4 lane dual carriageways

The study of British and Irish roads - their construction, numbering, history, mapping, past and future official roads proposals and general roads musings.

There is a separate forum for Street Furniture (traffic lights, street lights, road signs etc).

Registered users get access to other forums including discussions about other forms of transport, driving, fantasy roads and wishlists, and roads quizzes.

Moderator: Site Management Team

ldriver
Member
Posts: 12
Joined: Sun Sep 29, 2013 14:06

4 lane dual carriageways

Post by ldriver »

What examples are there of 4 lane each side (8 total) Dual carriageways? I think i've seen a term like D4 used around here to describe them :p I've seen pictures of one but can't seem to locate any on google maps etc.
User avatar
Mark Hewitt
Member
Posts: 31612
Joined: Fri Dec 17, 2004 12:54
Location: Chester-le-Street

Re: 4 lane dual carraigeways

Post by Mark Hewitt »

This is one http://goo.gl/maps/QuXmr sure many of the lanes are for turning off etc, but the cross section is D4.
User avatar
MiChaos
Member
Posts: 180
Joined: Thu May 03, 2012 12:32
Location: Wiltshire

Re: 4 lane dual carriageways

Post by MiChaos »

Street View is a little behind the times, but isn't this a D4?
User avatar
PeterA5145
Member
Posts: 25347
Joined: Sun Mar 24, 2002 00:19
Location: Stockport, Cheshire
Contact:

Re: 4 lane dual carriageways

Post by PeterA5145 »

Plenty on the motorway network, such as the A1(M) between Alconbury and Peterborough. The A2 in North Kent is a good non-motorway example. I know it looks like a motorway, but it isn't.
“The human race divides politically into those who want people to be controlled and those who have no such desire.” – Robert A. Heinlein
User avatar
Mark Hewitt
Member
Posts: 31612
Joined: Fri Dec 17, 2004 12:54
Location: Chester-le-Street

Re: 4 lane dual carriageways

Post by Mark Hewitt »

PeterA5145 wrote:Plenty on the motorway network, such as the A1(M) between Alconbury and Peterborough. The A2 in North Kent is a good non-motorway example. I know it looks like a motorway, but it isn't.
But that's a D4M isn't it not?
WHBM
Member
Posts: 9791
Joined: Thu Nov 30, 2006 18:01
Location: London

Re: 4 lane dual carriageways

Post by WHBM »

Here's a long-standing D5 on the A406 North Circular Road in Woodford, east London

https://maps.google.co.uk/?ll=51.595575 ... 7,,0,10.69
samxool
Member
Posts: 512
Joined: Fri May 28, 2004 16:00

Re: 4 lane dual carriageways

Post by samxool »

i'm assuming we're excluding Motorways from this then?

The A27 between the A2030 and A3(M) is D4 (and with hard shoulders too!) http://goo.gl/maps/i0aRl

The A31/A338 multiplex (about a mile long) is D4
http://goo.gl/maps/xtouI

I'm really struggling to think of any others in the South East that haven't already been mentioned.
User avatar
multiraider2
Member
Posts: 3748
Joined: Tue Apr 27, 2004 17:42
Location: London, SE

Re: 4 lane dual carriageways

Post by multiraider2 »

Mark Hewitt wrote:
PeterA5145 wrote:Plenty on the motorway network, such as the A1(M) between Alconbury and Peterborough. The A2 in North Kent is a good non-motorway example. I know it looks like a motorway, but it isn't.
But that's a D4M isn't it not?
I assume you meant the M1 example. The A2 certainly looks like a motorway but isn't one. It's always been high quality. Going back to building in the seventies there were three lanes along there and then two for the M2.
Also Ian.
User avatar
c2R
SABRE Wiki admin
Posts: 11323
Joined: Fri Jul 05, 2002 11:01

Re: 4 lane dual carriageways

Post by c2R »

samxool wrote:i'm assuming we're excluding Motorways from this then?

The A27 between the A2030 and A3(M) is D4 (and with hard shoulders too!) http://goo.gl/maps/i0aRl

The A31/A338 multiplex (about a mile long) is D4
http://goo.gl/maps/xtouI

I'm really struggling to think of any others in the South East that haven't already been mentioned.
There's probably loads in urban areas on the approaches to traffic lights! So length might need to be another criteria!
Is there a road improvement project going on near you? Help us to document it on the SABRE Wiki - help is available in the Digest forum.
Have you browsed SABRE Maps recently? Get involved! - see our guide to scanning and stitching maps
WHBM
Member
Posts: 9791
Joined: Thu Nov 30, 2006 18:01
Location: London

Re: 4 lane dual carriageways

Post by WHBM »

User avatar
Mark Hewitt
Member
Posts: 31612
Joined: Fri Dec 17, 2004 12:54
Location: Chester-le-Street

Re: 4 lane dual carriageways

Post by Mark Hewitt »

multiraider2 wrote:
I assume you meant the M1 example. The A2 certainly looks like a motorway but isn't one. It's always been high quality. Going back to building in the seventies there were three lanes along there and then two for the M2.
No I meant the A2 example. It has 4 running lanes plus hard shoulder which makes it D4M.

cbrd.co.uk : "D3M is a dual carriageway with three lanes each way and is equipped with full hard shoulders. The 'M' refers to the fact that this is a motorway formation, but a non-motorway road equipped with full hard shoulders is described this way too (i.e. it is an engineering term, not a legal one)."
User avatar
multiraider2
Member
Posts: 3748
Joined: Tue Apr 27, 2004 17:42
Location: London, SE

Re: 4 lane dual carriageways

Post by multiraider2 »

Mark Hewitt wrote:
multiraider2 wrote:
I assume you meant the M1 example. The A2 certainly looks like a motorway but isn't one. It's always been high quality. Going back to building in the seventies there were three lanes along there and then two for the M2.
No I meant the A2 example. It has 4 running lanes plus hard shoulder which makes it D4M.

cbrd.co.uk : "D3M is a dual carriageway with three lanes each way and is equipped with full hard shoulders. The 'M' refers to the fact that this is a motorway formation, but a non-motorway road equipped with full hard shoulders is described this way too (i.e. it is an engineering term, not a legal one)."
Duly noted and out-pedanted.
Also Ian.
User avatar
orudge
Site Manager
Posts: 8528
Joined: Sun May 27, 2007 12:23
Location: Banchory
Contact:

Re: 4 lane dual carriageways

Post by orudge »

Part of the A494 is technically D4M, although in the eastbound direction one of the lanes becomes a lane drop, and in the westbound direction, the extra lane was never opened and the hard shoulder is extra-wide as a result.

The road was to continue as D4M over the bridge (or D3+4M, possibly), but the cancellation of Drome to Ewloe in 2008 means this will probably not be completed any time soon. :(
User avatar
wrinkly
Member
Posts: 9049
Joined: Tue Mar 04, 2008 12:17
Location: Leeds

Re: 4 lane dual carriageways

Post by wrinkly »

A5103 is D4 between the M56/A560 and M60 J5, except that it is D3+HS within the junction with the B5166/7.
Jamesabout29
Member
Posts: 267
Joined: Wed Jul 03, 2013 18:54
Location: Benfleet, Essex.

Re: 4 lane dual carriageways

Post by Jamesabout29 »

MiChaos wrote:Street View is a little behind the times, but isn't this a D4?
I can confirm it is a D4, since I live about 1 mile (if that) away :wink:

The roadworks are the Sadlers Farm Roundabout improvement works that involved a widening of the A13 from D2 to D4 and were completed not that long ago
Hope I helped :D
Railway, road, sky, football, rugby enthusiast since 2001 ;)

Proud to share a birthday with the M25!!
darkcape
Member
Posts: 2101
Joined: Wed Aug 29, 2012 14:54

Re: 4 lane dual carriageways

Post by darkcape »

The A52 Clifton Bridge here is 4 lanes in each direction, though it's a sort of D3+1/D4 layout.
Did you know there's more to SABRE than just the Forums?
Add your roads knowledge to the SABRE Wiki today!
Have you browsed SABRE Maps recently? Try getting involved!
User avatar
Sunil_of_Yoxley
Member
Posts: 1770
Joined: Mon Oct 06, 2003 12:14
Location: Ilford, East London
Contact:

Re: 4 lane dual carriageways

Post by Sunil_of_Yoxley »

Jamesabout29 wrote:
MiChaos wrote:Street View is a little behind the times, but isn't this a D4?
I can confirm it is a D4, since I live about 1 mile (if that) away :wink:

The roadworks are the Sadlers Farm Roundabout improvement works that involved a widening of the A13 from D2 to D4 and were completed not that long ago
Hope I helped :D
D4 it is!
Image
Image
My London railway station photos on Wikimedia Commons
User avatar
Sunil_of_Yoxley
Member
Posts: 1770
Joined: Mon Oct 06, 2003 12:14
Location: Ilford, East London
Contact:

Re: 4 lane dual carriageways

Post by Sunil_of_Yoxley »

Another D4 section on the A13:
Image


And there's another section in Rainham.
Last edited by Sunil_of_Yoxley on Sun Nov 10, 2013 01:15, edited 2 times in total.
My London railway station photos on Wikimedia Commons
SuperCoolAl
Member
Posts: 277
Joined: Fri Jan 13, 2006 17:33
Location: West Yorkshire

Re: 4 lane dual carriageways

Post by SuperCoolAl »

M62 J25-26 is now D4. No hard shoulder.
User avatar
hoagy_ytfc
Member
Posts: 632
Joined: Sun May 23, 2010 00:10

Re: 4 lane dual carriageways

Post by hoagy_ytfc »

Sunil_of_Yoxley wrote:D4 it is!
If that's D4, then so is the A34 for a stretch south of the junction with the M4.

No idea if this is an 'official' term, but I'd call it D2+2 or something like that. It's not really four lanes each way, it's two pairs of two.
Post Reply